Question

A carbon chamber of volume 1.5 cm3 is placed in a carbon block and centered in a 24 MV betatron beam. The block is adjusted in thickness to give the maximum ionization. An ionization of 3.0 x 10^-8 coulomb is collected in 30 seconds. The temperature is 25°C, the pressure is 75.5 cm of Hg. Find the absorbed dose rate in water at the peak of the buildup curve. Assume mean stopping power of carbon relative to air is 0.95.

Answer 1